Viewing window to monitor the status of the firing head : Pro-Sensor and Hammar inflation systems indicate visually the status of the firing head (green = lifejacket is operational). If the gas bottle is pierced or not properly tightened, the indicator turns red automatically.

Hammar viewing window

Y-shaped 25 mm polypropylene straps hold the lifejacket flat on the back and ensure a better weight distribution on the shoulders.

On Hammar hydrostatic model : a mesh patch built into the outer cover accelerates the water entry to trigger the firing head quicker and ensure a prompt deployment of the inflated jacket.